Agency sources said the questioning may take place before the CBI files the chargesheet in the case on March 31.Kanimozhi holds 20 per cent stakes in Kalaignar TV, where a company linked to one of the accused in the scam Shahid Balwa had invested.

She was in the news over conversations with corporate lobbyist Niira Radia as revealed by the leaked telephone calls tapped by the income tax department.